Locomotive valve-gear.



J. E. WINCHESTER,

LOCOMOTIVE VALVE GEAR.

APPLICATION FILED FEB. 19. 1915.

1,146,678, Patented July 13, 1915.

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LOCOMOTIVE VALVE GEAR.

APPLICATION FILED FEB. 19. ms.

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Specification of Letters Patent.

Patented July 13, 1915.

Application filed February 19, 1915. SerialNo. 9,396;

To all whom it may concern Be it known that 1, JOHN E. VJINCHESTER, acitizen of the United States, residing at Charlotte, in the county ofMecklenburg declare the followin to be a full clear and exactdescription of the invention, such as will enable others skilled intheart' to which it appertains to make and use the same.

This invention relates to improvements in locomotive valve gear.

The object of the present invention is to improve the construction oflocomotive valve gear and to provide an exceedingly simple, practicaland eliicient valve gear designed for use on locomotives and other steamengines and capable of afiording a variable cut-off and of enabling thevalve to remain absolutely stationary when the reversing mechanism is inthe central position.

lVith these and other objects in view the invention consists in theconstruction and novel combination and arrangement of parts theaccompanying drawings and pointed out in the claims hereto. appended, itbeing understood that various changes in the form, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

Figure 1 is a side elevation of a valve gear constructed in accordancewith this inv ntion and shown applied to a portion of a locomotive, Fig.2 is a similar view showing the reversing mechanism of the valve gear ina different position from Fig. 1, and Fig. 3 is a transverse sectionalview on line 33 of Fig. 1.

Like numerals of reference designate cordrawings.

In the accompanying drawings in which is illustrated the preferredembodiment of the invention, 1 designates a bellcrank fulcrumed at itsangle on a pin 2 or other suitvalve stem 3 of the locomotive and-havingone of its arms 4: arranged to swing upwardly and downwardly to pointsabove and below the horizontal plane of the valve stem 3. The pin 2which constitutes the pivot of the bell crank is mounted in a suitablebearhereinafter fully described, illustrated in responding parts in allof the figures of the able pivot in the horizontal plane of the.

ing 5 which is bolted or otherwise secured to an arm or standardfi butthe bell crank may be mounted in any other desired manner. Thearin 1which extends forwardly from the'pi-vot of the bell crank carries aradius link 7 pivoted at its forward end to the outer end of the arm lbya pin 8 or other suitable fastening device and extending rearwardly fromthe pivot. The radius link is pivotally connected at its rear end bya-pin 9 or other suitable fastening device to the rear end of a link rod10 which is connected with the valve stem 3. The arm 4 of'the bell crankand the radius link"? constitute a reverse or reversingjmechanisin whichis exceedingly simple asit is adapted to dispense with the radius yoke"ordinarily employed and when the rear end of the radius link occupiesthe position above or below the horizontal plane of the valve stem, theoscillatory movement of thebell crank through the radius link is adaptedto reciprocate the valve in the usual manner. This construction providesa variable cut-off and when the arm of the bell crank is in a centralposition with the pivot 8 in alinement with the pin 2 and the valve stem3, the valve will remain absolutely stationary.

Vibratory motion is imparted to the bell crank by an eccentric rod 11pivotally connected at its rear end by a pin 12 to an auxiliary crank 13of the axle ll of the main drive wheel 15 of the locomotive and havingan upturned forward end 16 which is pivoted by a pin 17 "or othersuitable fastening device to a depending arm 18 of the bell crank 1.Various other means, however, may be employed for actuating theeccentric rod and when; the eccentric rod is reciprocated the dependingarm 18 of the bell crank willloe oscillated in a'backward and forwarddirection.

The radius link is supported at its rear end by an approximatelyvertical link rod 19 connected at its upper end to the radius link bythe pin 9 extending therefrom to a rearwardly extending arm 20 of a rockshaft 21 which is designed to extend entirely across the frame of thelocomotive. The rock shaft 21 which is journaled in suitable bearings isequipped with a forwardly ex tending weighted counterbalancing arm 22and it is provided with an upwardly extending operating arm 23 which isconnected at its upper end by a reach rod 2a with a re of the saidcentral position the valve gear is versing lever, (not, shown). Theforwardly extending counterbalancing arm 22 is equipped with aslidableweight 25 adapted to be secured at difierent distances frompointin advance of its central position the valve gear is in forward motionand when the sald arm 23 is carried to a point 1n rear in backwardmotion.

While the valve gear is designed primarily for use on locomotives it,of'course, may be advantageously employed on various types of steamengines.

What is claimed is 1. A valve gear including a bell crank fulcrumed atits angle in substantially the horizontal plane of the valve stemof anengine and having one of its arms arranged to swing to opposite sides ofthe said plane, aradius link carried by the said arm of the bell crankand arranged to swing from a central point coincident with the pivot ofthe bell crank to points at either side of the same-to provide avariable cut off, means for adjusting the radius link and means forimparting motion to the bell crank.

52. A valve gear including a bell crank fulcrumed at its angle insubstantially the horizontal plane of gine and having one of its armsarranged to swing to opposite sides of the said plane, a radius linkcarried by the said arm of the bell crank and arranged to swing from acentral point coincident with the pivot of the bell crank to points ateither side of the same to provide a variable cut-off, meansforadjusting the radius link and an eccentric rod connected with one of thearms of the bell crank for imparting motion to the same.

3. A valve gear including a bell crank fulcrumed at its angle insubstantially the,

Copies of this patent may be obtained for five cents each, by addressingthe the valve stem ofan encentral point coincident with the pivot of thebell crank to points at either side of the same to provide a variablecut-off, means for imparting motion to the bell crank, a shaft having anarm located beneath the radius link, a link rod connecting the arm 'withthe radius link and means for partially rotating the shaft to adjust theradius link. V

4. A valve gear including a bell crank fulcrumeda't its angle insubstantially the horizontal'plane of the valve stem of an engine andhaving one of its arms arranged to swing to opposite sides of the saidplane, a radiuslink carried by the said arm of the bell crank andarranged to swing from a central point coincident with the pivot of thebell crank to points at either side of the same to provide a variablecut-oil, means for imparting motion to the bell crank, a counterbalancedshaft having an arm extending beneath the radius link and connectedtherewith, said shaft being also provided with an upwardly extendingoperating arm and a reach rod connected .to the operating arm.

5. The combination with a valve stem of a bell crank fulcrumed at itsangle on a horizontal axis in the rear of the valve stem and having aforwardly extending arm and a depending arm, a radius link pivoted tothe forwardly extending arm and extending rearwardly from its pivot,means for connecting the radius link with the valve stem,

means for adjusting the radius link up wardly and downwardly above andbelow a central point coincident with the fulcrum of the bell crank andan eccentric rod connected to the depending arm of the bell crank. I

In testimony whereof I affix my signature in presence of two witnesses.

Witnesses V. G. JARRELL, W. L. Isnmzroun.

Commissioner of Patents.

Washington, D. G.

JOHN E. wrNoHEs'TER.

